OPTICAL SENSORS FOR MEASURING pH IN FLUIDS - Patent 0703750

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EP 0 703 750 A1

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(43)	Date of publication:
	03.04.1996 Bulletin 1996/14

(21)	Application number: 94920073.0

(22)	Date of filing: 02.06.1994

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International Patent Classification (IPC):

G01N 21/ 80^{( . )}
C08F 290/ 06^{( . )}
G01N 21/ 64^{( . )}

C08F 290/ 00^{( . )}
C08L 75/ 14^{( . )}
G01N 21/ 77^{( . )}

(86)	International application number:
	PCT/US1994/006258

(87)	International publication number:
	WO 1994/028786 (22.12.1994 Gazette 1994/28)

(84)	Designated Contracting States:
	DE FR GB IT

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Priority:

10.06.1993 US 19930074749

(71)	Applicant: OPTICAL SENSORS INCORPORATED
	Minneapolis, MN 55344 (US)

(72)	Inventors:
	OLSTEIN, Alan Mendota Heights, MN 55118 (US) FOWLER, William Minneapolis, MN 55417 (US) PRITCHARD, Jo Mound, MN 55364 (US)

(74)	Representative: Belcher, Simon James
	Urquhart-Dykes & Lord Tower House Merrion Way Leeds LS2 8PA Leeds LS2 8PA (GB)

(54)	OPTICAL SENSORS FOR MEASURING pH IN FLUIDS